the unicef says poor families in eastern europe sometimes sell their families to traffic -- sell their family members to traffickers, often in the mistaken hope that they will find a better life. >> in romania, which is a european union country, some children are still not registered. no one knows where they are born or that they are alive, and so they can just disappear. >> once over the border, traffickers threaten to hurt the children's families if they speak out. that makes it difficult to investigate, and when arrests are made, it is usually low- level figures, rather than the kingpins to control things. >> it is a whole network -- there are procurers, smoke and prostitutes, money launderers, forgers, and professional smugglers. >> unicef says victims who want to speak out must be better protected and should not be deported.